[CodeGen][NewPM] Port MachineCopyPropagation to NPM#125202

optimisan merged 3 commits intomainllvm/llvm-project:mainfrom

users/Akshat-Oke/01-31-_codegen_newpm_port_machinecopypropagation_to_npmllvm/llvm-project:users/Akshat-Oke/01-31-_codegen_newpm_port_machinecopypropagation_to_npmCopy head branch name to clipboard